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Very Fast Watermarking by Reversible Contrast Mapping
IEEE Signal Processing Letters, no. 4 (2007): 255-258
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摘要
Reversible contrast mapping (RCM) is a simple integer transform that applies to pairs of pixels. For some pairs of pixels, RCM is invertible, even if the least significant bits (LSBs) of the transformed pixels are lost. The data space occupied by the LSBs is suitable for data hiding. The embedded information bit-rates of the proposed spat...更多
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